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insertAfter yields "No such field" error
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created by <a href="https://community.jboss.org/people/markasllen">markasllen</a> in <i>Javassist</i> - <a href="https://community.jboss.org/message/782421#782421">View the full discussion</a>
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<div class="jive-rendered-content"><p>I have to edit Labels that are being defined inside the constructor of a class.</p><p>Because those labels use getters and setters for the text, I decided to redefine them at the end of the constructor.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> <font color="navy"><b>class</b></font> StaticPraxMMod <font color="navy">{</font>
 
    <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>final</b></font> String PRAXFRAME = <font color="red">"com.praxemu.client.graphics.widgets.PraxFrame"</font>;
 
    <font color="navy"><b>public</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>void</b></font> main(String[] args) <font color="navy"><b>throws</b></font> Exception <font color="navy">{</font>   
        ClassPool classPool = ClassPool.getDefault();
        addEVLink(classPool);
 
    <font color="navy">}</font>
 
    <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>void</b></font> addEVLink(ClassPool classPool) <font color="navy"><b>throws</b></font> NotFoundException, CannotCompileException, IOException <font color="navy">{</font>
        CtClass praxFrameClass = classPool.get(PRAXFRAME);
        CtConstructor praxFrameConstructor = praxFrameClass.getConstructors()[0]<font color="darkgreen">/*(new CtClass[] {})*/</font>;
        <font color="darkgreen">//praxFrameClass.addConstructor(praxFrameConstructor);</font>
 
        praxFrameConstructor.insertAfter(<font color="red">"localLabel25 = new de.matthiasmann.twl.Label(new StringBuilder().append(paramsuper.õo0000().o00000(null.Ô00000)).append(\"\").toString() + \"peanuts\");\n"</font>
                <font color="red">"localLabel26 = new de.matthiasmann.twl.Label(new StringBuilder().append(paramsuper.õo0000().o00000(null.class)).append(\"\").toString() + \"peanuts\");\n"</font> +
                <font color="red">"localLabel27 = new de.matthiasmann.twl.Label(new StringBuilder().append(paramsuper.õo0000().o00000(null.õ00000)).append(\"\").toString() + \"peanuts\");\n"</font> +
                <font color="red">"localLabel28 = new de.matthiasmann.twl.Label(new StringBuilder().append(paramsuper.õo0000().o00000(null.ÓO0000)).append(\"\").toString() + \"peanuts\");\n"</font> +
                <font color="red">"localLabel29 = new de.matthiasmann.twl.Label(new StringBuilder().append(paramsuper.õo0000().o00000(null.interface)).append(\"\").toString() + \"peanuts\");\n"</font> +
                <font color="red">"localLabel25.setTheme(\"label-value\");\n"</font> +
                <font color="red">"localLabel26.setTheme(\"label-value\");\n"</font> +
                <font color="red">"localLabel27.setTheme(\"label-value\");\n"</font> +
                <font color="red">"localLabel28.setTheme(\"label-value\");\n"</font> +
                <font color="red">"localLabel29.setTheme(\"label-value\");"</font>);
        <font color="darkgreen">//praxFrameClass.toBytecode();</font>
        praxFrameClass.writeFile(<font color="red">"."</font>);
 
    <font color="navy">}</font>
<font color="navy">}</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When running it, I get this :</p><pre class="jive-pre"><code class="jive-code">Exception in thread "main" javassist.CannotCompileException: [source error] no such field: localLabel25
    at javassist.CtBehavior.insertAfter(CtBehavior.java:873)
    at javassist.CtBehavior.insertAfter(CtBehavior.java:788)
    at StaticPraxMMod.addEVLink(StaticPraxMMod.java:27)
    at StaticPraxMMod.main(StaticPraxMMod.java:18)
Caused by: compile error: no such field: localLabel25
    at javassist.compiler.TypeChecker.fieldAccess(TypeChecker.java:819)
    at javassist.compiler.TypeChecker.atFieldAssign(TypeChecker.java:271)
    at javassist.compiler.JvstTypeChecker.atFieldAssign(JvstTypeChecker.java:84)
    at javassist.compiler.TypeChecker.atAssignExpr(TypeChecker.java:230)
    at javassist.compiler.ast.AssignExpr.accept(AssignExpr.java:39)
    at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:242)
    at javassist.compiler.CodeGen.atStmnt(CodeGen.java:330)
    at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
    at javassist.compiler.Javac.compileStmnt(Javac.java:569)
    at javassist.CtBehavior.insertAfterAdvice(CtBehavior.java:888)
    at javassist.CtBehavior.insertAfter(CtBehavior.java:847)
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I tried adding the full package path to labels but it doesn't change a thing.<br/>I had the same issue with Label when I did "de.matthiasmann.twl.Label localLabel25 = new de.matthiasmann.twl.Label[...]" with and without the full package path.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I would also like to know if injecting something like </p><pre class="jive-pre"><code class="jive-code jive-java">localLabel25.setText(localLabel25.getText().append(\<font color="red">" peanuts\"));</font>
</code></pre><p> would work.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks for your help.</p></div>
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<p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/782421#782421">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in Javassist at <a href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2062">Community</a></p>
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